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100 _aPanigada, Cinzia
_950925
245 _aA new approach for biocrust and vegetation monitoring in drylands using multi-temporal Sentinel-2 images/
260 _bSage,
_c2019.
300 _aVol 43, issue 4, 2019 : (496-520 p.).
520 _aDrylands, one of the planet’s largest terrestrial biomes, are suggested to be greatly threatened by climate change. Drylands are usually sparsely vegetated, and biological soil crusts (biocrusts) – that is, soil surface communities of cyanobacteria, mosses and/or lichens – can cover up to 70% of dryland cover. As they control key ecosystem processes, monitoring their spatial and temporal distribution can provide highly valuable information. In this study, we examine the potential of European Space Agency’s (ESA) Sentinel-2 (S2) data to characterize the spatial and temporal development of biocrust and vascular plant greening along a rainfall gradient of the Negev Desert (Israel). First, the chlorophyll a absorption feature in the red region (CRred) was identified as the index mostly sensitive to changes in biocrust greening but minimally affected by changes in soil moisture. This index was then computed on the S2 images and enabled monitoring the phenological dynamics of different dryland vegetation components from August 2015 to August 2017. The analysis of multi-temporal S2 images allowed us to successfully track the biocrust greening within 15 days from the first seasonal rain events in the north of Negev, and to identify the maximum development of annual vascular plants and greening of perennial ones. These results show potential for monitoring arid and semi-arid environments using the newly available S2 images, allowing new insights into dryland vegetation dynamics.
650 _aBiological soil crust,
_950926
650 _a remote sensing,
_950690
650 _asatellite,
_950927
650 _ahyperspectral,
_950928
650 _a multispectral,
_950929
650 _adrylands,
_950664
650 _acontinuum removal,
_950930
650 _a phenology
_950931
700 _a Giulia Tagliabue,
_950932
700 _aZaady, Eli
_950933
700 _aRozenstein, Offer
_950934
700 _aGarzonio, Roberto
_950935
700 _aMauro, Biagio Di
_950936
700 _aAmicis, Mattia De
_950937
700 _a Colombo, Roberto
_950938
700 _aCogliati, Sergio
_950939
700 _aMiglietta, Franco
_950940
700 _aRossini, Micol
_950941
773 0 _012665
_916502
_dLondon: Sage Publication Ltd, 2019.
_tProgress in Physical Geography: Earth and Environment/
_x03091333
856 _uhttps://doi.org/10.1177/0309133319841903
942 _2ddc
_cART
999 _c12700
_d12700